I have guided several on Jeep Jamboree's and they do just fine. Lets think about this for a moment.. 32" tires, 4:1 t-case.. Lockers... Hell put that in a 73 Nova and it will do the the trail okay. That being said I also have taken the bone stockers jk's, tj's zj's etc on some of the same trials the harder groups run, and while we might take a bit more time getting over them, might have to winch or strap abit more, we get done. Thus I think a Jk rubi in stock form shoul be fine,